start with the date of purchase and description of vessel and anything else you want to share. Add weekly updates as the work progresses (or monthly) see codstewarts blog for an example of one that just groes. Alternatively there is a better example on this forum of the English Gentleman who has got most of the way (and most of his money) in the restoration of a beautiful vessel across the other side of the pond. I cant remember his name, but the link is since Xmas.